summaryrefslogtreecommitdiffstatshomepage
path: root/3rdparty/SDL2/src/video/emscripten/SDL_emscriptenopengles.c
diff options
context:
space:
mode:
Diffstat (limited to '3rdparty/SDL2/src/video/emscripten/SDL_emscriptenopengles.c')
-rw-r--r--3rdparty/SDL2/src/video/emscripten/SDL_emscriptenopengles.c117
1 files changed, 117 insertions, 0 deletions
diff --git a/3rdparty/SDL2/src/video/emscripten/SDL_emscriptenopengles.c b/3rdparty/SDL2/src/video/emscripten/SDL_emscriptenopengles.c
new file mode 100644
index 00000000000..12a37c60481
--- /dev/null
+++ b/3rdparty/SDL2/src/video/emscripten/SDL_emscriptenopengles.c
@@ -0,0 +1,117 @@
+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+
+#if SDL_VIDEO_DRIVER_EMSCRIPTEN && SDL_VIDEO_OPENGL_EGL
+
+#include <emscripten/emscripten.h>
+#include <GLES2/gl2.h>
+
+#include "SDL_emscriptenvideo.h"
+#include "SDL_emscriptenopengles.h"
+
+#define LOAD_FUNC(NAME) _this->egl_data->NAME = NAME;
+
+/* EGL implementation of SDL OpenGL support */
+
+int
+Emscripten_GLES_LoadLibrary(_THIS, const char *path) {
+ /*we can't load EGL dynamically*/
+ _this->egl_data = (struct SDL_EGL_VideoData *) SDL_calloc(1, sizeof(SDL_EGL_VideoData));
+ if (!_this->egl_data) {
+ return SDL_OutOfMemory();
+ }
+
+ LOAD_FUNC(eglGetDisplay);
+ LOAD_FUNC(eglInitialize);
+ LOAD_FUNC(eglTerminate);
+ LOAD_FUNC(eglGetProcAddress);
+ LOAD_FUNC(eglChooseConfig);
+ LOAD_FUNC(eglGetConfigAttrib);
+ LOAD_FUNC(eglCreateContext);
+ LOAD_FUNC(eglDestroyContext);
+ LOAD_FUNC(eglCreateWindowSurface);
+ LOAD_FUNC(eglDestroySurface);
+ LOAD_FUNC(eglMakeCurrent);
+ LOAD_FUNC(eglSwapBuffers);
+ LOAD_FUNC(eglSwapInterval);
+ LOAD_FUNC(eglWaitNative);
+ LOAD_FUNC(eglWaitGL);
+ LOAD_FUNC(eglBindAPI);
+
+ _this->egl_data->egl_display = _this->egl_data->eglGetDisplay(EGL_DEFAULT_DISPLAY);
+ if (!_this->egl_data->egl_display) {
+ return SDL_SetError("Could not get EGL display");
+ }
+
+ if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
+ return SDL_SetError("Could not initialize EGL");
+ }
+
+ _this->gl_config.driver_loaded = 1;
+
+ if (path) {
+ SDL_strlcpy(_this->gl_config.driver_path, path, sizeof(_this->gl_config.driver_path) - 1);
+ } else {
+ *_this->gl_config.driver_path = '\0';
+ }
+
+ return 0;
+}
+
+void
+Emscripten_GLES_DeleteContext(_THIS, SDL_GLContext context)
+{
+ /*
+ WebGL contexts can't actually be deleted, so we need to reset it.
+ ES2 renderer resets state on init anyway, clearing the canvas should be enough
+ */
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+
+ SDL_EGL_DeleteContext(_this, context);
+}
+
+SDL_EGL_CreateContext_impl(Emscripten)
+SDL_EGL_SwapWindow_impl(Emscripten)
+SDL_EGL_MakeCurrent_impl(Emscripten)
+
+void
+Emscripten_GLES_GetDrawableSize(_THIS, SDL_Window * window, int * w, int * h)
+{
+ SDL_WindowData *data;
+ if (window->driverdata) {
+ data = (SDL_WindowData *) window->driverdata;
+
+ if (w) {
+ *w = window->w * data->pixel_ratio;
+ }
+
+ if (h) {
+ *h = window->h * data->pixel_ratio;
+ }
+ }
+}
+
+#endif /* SDL_VIDEO_DRIVER_EMSCRIPTEN && SDL_VIDEO_OPENGL_EGL */
+
+/* vi: set ts=4 sw=4 expandtab: */
+